947 lines
23 KiB
C
947 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Renesas R-Car Audio DMAC support
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//
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// Copyright (C) 2015 Renesas Electronics Corp.
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// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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#include <linux/delay.h>
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#include <linux/of_dma.h>
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#include "rsnd.h"
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/*
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* Audio DMAC peri peri register
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*/
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#define PDMASAR 0x00
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#define PDMADAR 0x04
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#define PDMACHCR 0x0c
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/* PDMACHCR */
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#define PDMACHCR_DE (1 << 0)
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struct rsnd_dmaen {
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struct dma_chan *chan;
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dma_cookie_t cookie;
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unsigned int dma_len;
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};
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struct rsnd_dmapp {
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int dmapp_id;
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u32 chcr;
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};
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struct rsnd_dma {
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struct rsnd_mod mod;
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struct rsnd_mod *mod_from;
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struct rsnd_mod *mod_to;
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dma_addr_t src_addr;
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dma_addr_t dst_addr;
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union {
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struct rsnd_dmaen en;
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struct rsnd_dmapp pp;
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} dma;
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};
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struct rsnd_dma_ctrl {
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void __iomem *ppbase;
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phys_addr_t ppres;
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int dmaen_num;
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int dmapp_num;
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};
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#define rsnd_priv_to_dmac(p) ((struct rsnd_dma_ctrl *)(p)->dma)
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#define rsnd_mod_to_dma(_mod) container_of((_mod), struct rsnd_dma, mod)
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#define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en)
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#define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp)
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/* for DEBUG */
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static struct rsnd_mod_ops mem_ops = {
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.name = "mem",
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};
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static struct rsnd_mod mem = {
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};
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/*
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* Audio DMAC
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*/
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static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io)
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{
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if (rsnd_io_is_working(io))
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rsnd_dai_period_elapsed(io);
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}
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static void rsnd_dmaen_complete(void *data)
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{
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struct rsnd_mod *mod = data;
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rsnd_mod_interrupt(mod, __rsnd_dmaen_complete);
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}
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static struct dma_chan *rsnd_dmaen_request_channel(struct rsnd_dai_stream *io,
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struct rsnd_mod *mod_from,
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struct rsnd_mod *mod_to)
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{
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if ((!mod_from && !mod_to) ||
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(mod_from && mod_to))
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return NULL;
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if (mod_from)
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return rsnd_mod_dma_req(io, mod_from);
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else
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return rsnd_mod_dma_req(io, mod_to);
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}
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static int rsnd_dmaen_stop(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
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struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
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if (dmaen->chan)
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dmaengine_terminate_async(dmaen->chan);
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return 0;
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}
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static int rsnd_dmaen_cleanup(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
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struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
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/*
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* DMAEngine release uses mutex lock.
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* Thus, it shouldn't be called under spinlock.
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* Let's call it under prepare
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*/
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if (dmaen->chan)
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dma_release_channel(dmaen->chan);
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dmaen->chan = NULL;
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return 0;
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}
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static int rsnd_dmaen_prepare(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
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struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
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struct device *dev = rsnd_priv_to_dev(priv);
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/* maybe suspended */
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if (dmaen->chan)
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return 0;
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/*
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* DMAEngine request uses mutex lock.
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* Thus, it shouldn't be called under spinlock.
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* Let's call it under prepare
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*/
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dmaen->chan = rsnd_dmaen_request_channel(io,
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dma->mod_from,
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dma->mod_to);
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if (IS_ERR_OR_NULL(dmaen->chan)) {
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dmaen->chan = NULL;
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dev_err(dev, "can't get dma channel\n");
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return -EIO;
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}
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return 0;
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}
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static int rsnd_dmaen_start(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
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struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
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struct snd_pcm_substream *substream = io->substream;
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struct device *dev = rsnd_priv_to_dev(priv);
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struct dma_async_tx_descriptor *desc;
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struct dma_slave_config cfg = {};
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enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
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int is_play = rsnd_io_is_play(io);
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int ret;
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/*
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* in case of monaural data writing or reading through Audio-DMAC
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* data is always in Left Justified format, so both src and dst
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* DMA Bus width need to be set equal to physical data width.
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*/
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if (rsnd_runtime_channel_original(io) == 1) {
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struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
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int bits = snd_pcm_format_physical_width(runtime->format);
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switch (bits) {
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case 8:
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buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
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break;
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case 16:
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buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
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break;
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case 32:
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buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
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break;
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default:
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dev_err(dev, "invalid format width %d\n", bits);
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return -EINVAL;
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}
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}
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cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
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cfg.src_addr = dma->src_addr;
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cfg.dst_addr = dma->dst_addr;
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cfg.src_addr_width = buswidth;
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cfg.dst_addr_width = buswidth;
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dev_dbg(dev, "%s %pad -> %pad\n",
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rsnd_mod_name(mod),
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&cfg.src_addr, &cfg.dst_addr);
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ret = dmaengine_slave_config(dmaen->chan, &cfg);
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if (ret < 0)
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return ret;
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desc = dmaengine_prep_dma_cyclic(dmaen->chan,
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substream->runtime->dma_addr,
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snd_pcm_lib_buffer_bytes(substream),
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snd_pcm_lib_period_bytes(substream),
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is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
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DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
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if (!desc) {
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dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
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return -EIO;
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}
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desc->callback = rsnd_dmaen_complete;
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desc->callback_param = rsnd_mod_get(dma);
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dmaen->dma_len = snd_pcm_lib_buffer_bytes(substream);
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dmaen->cookie = dmaengine_submit(desc);
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if (dmaen->cookie < 0) {
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dev_err(dev, "dmaengine_submit() fail\n");
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return -EIO;
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}
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dma_async_issue_pending(dmaen->chan);
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return 0;
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}
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struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node, char *name,
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struct rsnd_mod *mod, char *x)
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{
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struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
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struct device *dev = rsnd_priv_to_dev(priv);
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struct dma_chan *chan = NULL;
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struct device_node *np;
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int i = 0;
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for_each_child_of_node(of_node, np) {
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i = rsnd_node_fixed_index(dev, np, name, i);
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if (i < 0) {
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chan = NULL;
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of_node_put(np);
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break;
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}
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if (i == rsnd_mod_id_raw(mod) && (!chan))
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chan = of_dma_request_slave_channel(np, x);
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i++;
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}
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/* It should call of_node_put(), since, it is rsnd_xxx_of_node() */
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of_node_put(of_node);
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return chan;
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}
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static int rsnd_dmaen_attach(struct rsnd_dai_stream *io,
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struct rsnd_dma *dma,
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struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
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{
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struct rsnd_priv *priv = rsnd_io_to_priv(io);
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struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
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struct dma_chan *chan;
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/* try to get DMAEngine channel */
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chan = rsnd_dmaen_request_channel(io, mod_from, mod_to);
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if (IS_ERR_OR_NULL(chan)) {
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/* Let's follow when -EPROBE_DEFER case */
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if (PTR_ERR(chan) == -EPROBE_DEFER)
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return PTR_ERR(chan);
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/*
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* DMA failed. try to PIO mode
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* see
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* rsnd_ssi_fallback()
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* rsnd_rdai_continuance_probe()
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*/
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return -EAGAIN;
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}
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/*
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* use it for IPMMU if needed
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* see
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* rsnd_preallocate_pages()
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*/
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io->dmac_dev = chan->device->dev;
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dma_release_channel(chan);
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dmac->dmaen_num++;
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return 0;
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}
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static int rsnd_dmaen_pointer(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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snd_pcm_uframes_t *pointer)
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{
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struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
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struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
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struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
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struct dma_tx_state state;
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enum dma_status status;
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unsigned int pos = 0;
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status = dmaengine_tx_status(dmaen->chan, dmaen->cookie, &state);
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if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) {
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if (state.residue > 0 && state.residue <= dmaen->dma_len)
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pos = dmaen->dma_len - state.residue;
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}
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*pointer = bytes_to_frames(runtime, pos);
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return 0;
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}
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static struct rsnd_mod_ops rsnd_dmaen_ops = {
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.name = "audmac",
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.prepare = rsnd_dmaen_prepare,
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.cleanup = rsnd_dmaen_cleanup,
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.start = rsnd_dmaen_start,
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.stop = rsnd_dmaen_stop,
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.pointer = rsnd_dmaen_pointer,
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.get_status = rsnd_mod_get_status,
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};
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/*
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* Audio DMAC peri peri
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*/
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static const u8 gen2_id_table_ssiu[] = {
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/* SSI00 ~ SSI07 */
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0x00, 0x01, 0x02, 0x03, 0x39, 0x3a, 0x3b, 0x3c,
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/* SSI10 ~ SSI17 */
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0x04, 0x05, 0x06, 0x07, 0x3d, 0x3e, 0x3f, 0x40,
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/* SSI20 ~ SSI27 */
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0x08, 0x09, 0x0a, 0x0b, 0x41, 0x42, 0x43, 0x44,
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/* SSI30 ~ SSI37 */
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0x0c, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b,
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/* SSI40 ~ SSI47 */
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0x0d, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52,
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/* SSI5 */
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0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* SSI6 */
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0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* SSI7 */
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0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* SSI8 */
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0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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/* SSI90 ~ SSI97 */
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0x12, 0x13, 0x14, 0x15, 0x53, 0x54, 0x55, 0x56,
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};
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static const u8 gen2_id_table_scu[] = {
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0x2d, /* SCU_SRCI0 */
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0x2e, /* SCU_SRCI1 */
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0x2f, /* SCU_SRCI2 */
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0x30, /* SCU_SRCI3 */
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0x31, /* SCU_SRCI4 */
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0x32, /* SCU_SRCI5 */
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0x33, /* SCU_SRCI6 */
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0x34, /* SCU_SRCI7 */
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0x35, /* SCU_SRCI8 */
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0x36, /* SCU_SRCI9 */
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};
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static const u8 gen2_id_table_cmd[] = {
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0x37, /* SCU_CMD0 */
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0x38, /* SCU_CMD1 */
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};
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static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io,
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struct rsnd_mod *mod)
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{
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struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
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struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
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struct rsnd_mod *src = rsnd_io_to_mod_src(io);
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struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
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const u8 *entry = NULL;
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int id = 255;
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int size = 0;
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if ((mod == ssi) ||
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(mod == ssiu)) {
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int busif = rsnd_mod_id_sub(ssiu);
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entry = gen2_id_table_ssiu;
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size = ARRAY_SIZE(gen2_id_table_ssiu);
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id = (rsnd_mod_id(mod) * 8) + busif;
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} else if (mod == src) {
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entry = gen2_id_table_scu;
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size = ARRAY_SIZE(gen2_id_table_scu);
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id = rsnd_mod_id(mod);
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} else if (mod == dvc) {
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entry = gen2_id_table_cmd;
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size = ARRAY_SIZE(gen2_id_table_cmd);
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id = rsnd_mod_id(mod);
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}
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if ((!entry) || (size <= id)) {
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struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));
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dev_err(dev, "unknown connection (%s)\n", rsnd_mod_name(mod));
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/* use non-prohibited SRS number as error */
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return 0x00; /* SSI00 */
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}
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return entry[id];
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}
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static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io,
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struct rsnd_mod *mod_from,
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struct rsnd_mod *mod_to)
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{
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return (rsnd_dmapp_get_id(io, mod_from) << 24) +
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(rsnd_dmapp_get_id(io, mod_to) << 16);
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}
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#define rsnd_dmapp_addr(dmac, dma, reg) \
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(dmac->ppbase + 0x20 + reg + \
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(0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id))
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static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg)
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{
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struct rsnd_mod *mod = rsnd_mod_get(dma);
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struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
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struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
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struct device *dev = rsnd_priv_to_dev(priv);
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dev_dbg(dev, "w 0x%px : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data);
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iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg));
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}
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static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg)
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{
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struct rsnd_mod *mod = rsnd_mod_get(dma);
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struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
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struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
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return ioread32(rsnd_dmapp_addr(dmac, dma, reg));
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}
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static void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg)
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{
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struct rsnd_mod *mod = rsnd_mod_get(dma);
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struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
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struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
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void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg);
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u32 val = ioread32(addr);
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val &= ~mask;
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val |= (data & mask);
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iowrite32(val, addr);
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}
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static int rsnd_dmapp_stop(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
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int i;
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rsnd_dmapp_bset(dma, 0, PDMACHCR_DE, PDMACHCR);
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for (i = 0; i < 1024; i++) {
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if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE))
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return 0;
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udelay(1);
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}
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return -EIO;
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}
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static int rsnd_dmapp_start(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
|
|
struct rsnd_priv *priv)
|
|
{
|
|
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
|
|
struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
|
|
|
|
rsnd_dmapp_write(dma, dma->src_addr, PDMASAR);
|
|
rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR);
|
|
rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rsnd_dmapp_attach(struct rsnd_dai_stream *io,
|
|
struct rsnd_dma *dma,
|
|
struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
|
|
{
|
|
struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
|
|
struct rsnd_priv *priv = rsnd_io_to_priv(io);
|
|
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
|
|
dmapp->dmapp_id = dmac->dmapp_num;
|
|
dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE;
|
|
|
|
dmac->dmapp_num++;
|
|
|
|
dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n",
|
|
dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
static void rsnd_dmapp_debug_info(struct seq_file *m,
|
|
struct rsnd_dai_stream *io,
|
|
struct rsnd_mod *mod)
|
|
{
|
|
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
|
|
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
|
|
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
|
|
struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
|
|
|
|
rsnd_debugfs_reg_show(m, dmac->ppres, dmac->ppbase,
|
|
0x20 + 0x10 * dmapp->dmapp_id, 0x10);
|
|
}
|
|
#define DEBUG_INFO .debug_info = rsnd_dmapp_debug_info
|
|
#else
|
|
#define DEBUG_INFO
|
|
#endif
|
|
|
|
static struct rsnd_mod_ops rsnd_dmapp_ops = {
|
|
.name = "audmac-pp",
|
|
.start = rsnd_dmapp_start,
|
|
.stop = rsnd_dmapp_stop,
|
|
.quit = rsnd_dmapp_stop,
|
|
.get_status = rsnd_mod_get_status,
|
|
DEBUG_INFO
|
|
};
|
|
|
|
/*
|
|
* Common DMAC Interface
|
|
*/
|
|
|
|
/*
|
|
* DMA read/write register offset
|
|
*
|
|
* RSND_xxx_I_N for Audio DMAC input
|
|
* RSND_xxx_O_N for Audio DMAC output
|
|
* RSND_xxx_I_P for Audio DMAC peri peri input
|
|
* RSND_xxx_O_P for Audio DMAC peri peri output
|
|
*
|
|
* ex) R-Car H2 case
|
|
* mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out
|
|
* SSI : 0xec541000 / 0xec241008 / 0xec24100c
|
|
* SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000
|
|
* SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000
|
|
* CMD : 0xec500000 / / 0xec008000 0xec308000
|
|
*/
|
|
#define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8)
|
|
#define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc)
|
|
|
|
#define RDMA_SSIU_I_N(addr, i, j) (addr ##_reg - 0x00441000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4)))
|
|
#define RDMA_SSIU_O_N(addr, i, j) RDMA_SSIU_I_N(addr, i, j)
|
|
|
|
#define RDMA_SSIU_I_P(addr, i, j) (addr ##_reg - 0x00141000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4)))
|
|
#define RDMA_SSIU_O_P(addr, i, j) RDMA_SSIU_I_P(addr, i, j)
|
|
|
|
#define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i))
|
|
#define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i))
|
|
|
|
#define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i))
|
|
#define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i))
|
|
|
|
#define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i))
|
|
#define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i))
|
|
|
|
static dma_addr_t
|
|
rsnd_gen2_dma_addr(struct rsnd_dai_stream *io,
|
|
struct rsnd_mod *mod,
|
|
int is_play, int is_from)
|
|
{
|
|
struct rsnd_priv *priv = rsnd_io_to_priv(io);
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI);
|
|
phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU);
|
|
int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod) ||
|
|
!!(rsnd_io_to_mod_ssiu(io) == mod);
|
|
int use_src = !!rsnd_io_to_mod_src(io);
|
|
int use_cmd = !!rsnd_io_to_mod_dvc(io) ||
|
|
!!rsnd_io_to_mod_mix(io) ||
|
|
!!rsnd_io_to_mod_ctu(io);
|
|
int id = rsnd_mod_id(mod);
|
|
int busif = rsnd_mod_id_sub(rsnd_io_to_mod_ssiu(io));
|
|
struct dma_addr {
|
|
dma_addr_t out_addr;
|
|
dma_addr_t in_addr;
|
|
} dma_addrs[3][2][3] = {
|
|
/* SRC */
|
|
/* Capture */
|
|
{{{ 0, 0 },
|
|
{ RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) },
|
|
{ RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } },
|
|
/* Playback */
|
|
{{ 0, 0, },
|
|
{ RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) },
|
|
{ RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } }
|
|
},
|
|
/* SSI */
|
|
/* Capture */
|
|
{{{ RDMA_SSI_O_N(ssi, id), 0 },
|
|
{ RDMA_SSIU_O_P(ssi, id, busif), 0 },
|
|
{ RDMA_SSIU_O_P(ssi, id, busif), 0 } },
|
|
/* Playback */
|
|
{{ 0, RDMA_SSI_I_N(ssi, id) },
|
|
{ 0, RDMA_SSIU_I_P(ssi, id, busif) },
|
|
{ 0, RDMA_SSIU_I_P(ssi, id, busif) } }
|
|
},
|
|
/* SSIU */
|
|
/* Capture */
|
|
{{{ RDMA_SSIU_O_N(ssi, id, busif), 0 },
|
|
{ RDMA_SSIU_O_P(ssi, id, busif), 0 },
|
|
{ RDMA_SSIU_O_P(ssi, id, busif), 0 } },
|
|
/* Playback */
|
|
{{ 0, RDMA_SSIU_I_N(ssi, id, busif) },
|
|
{ 0, RDMA_SSIU_I_P(ssi, id, busif) },
|
|
{ 0, RDMA_SSIU_I_P(ssi, id, busif) } } },
|
|
};
|
|
|
|
/*
|
|
* FIXME
|
|
*
|
|
* We can't support SSI9-4/5/6/7, because its address is
|
|
* out of calculation rule
|
|
*/
|
|
if ((id == 9) && (busif >= 4))
|
|
dev_err(dev, "This driver doesn't support SSI%d-%d, so far",
|
|
id, busif);
|
|
|
|
/* it shouldn't happen */
|
|
if (use_cmd && !use_src)
|
|
dev_err(dev, "DVC is selected without SRC\n");
|
|
|
|
/* use SSIU or SSI ? */
|
|
if (is_ssi && rsnd_ssi_use_busif(io))
|
|
is_ssi++;
|
|
|
|
return (is_from) ?
|
|
dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr :
|
|
dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr;
|
|
}
|
|
|
|
/*
|
|
* Gen4 DMA read/write register offset
|
|
*
|
|
* ex) R-Car V4H case
|
|
* mod / SYS-DMAC in / SYS-DMAC out
|
|
* SSI_SDMC: 0xec400000 / 0xec400000 / 0xec400000
|
|
*/
|
|
#define RDMA_SSI_SDMC(addr, i) (addr + (0x8000 * i))
|
|
static dma_addr_t
|
|
rsnd_gen4_dma_addr(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
|
|
int is_play, int is_from)
|
|
{
|
|
struct rsnd_priv *priv = rsnd_io_to_priv(io);
|
|
phys_addr_t addr = rsnd_gen_get_phy_addr(priv, RSND_GEN4_SDMC);
|
|
int id = rsnd_mod_id(mod);
|
|
int busif = rsnd_mod_id_sub(mod);
|
|
|
|
/*
|
|
* SSI0 only is supported
|
|
*/
|
|
if (id != 0) {
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
|
|
dev_err(dev, "This driver doesn't support non SSI0");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return RDMA_SSI_SDMC(addr, busif);
|
|
}
|
|
|
|
static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io,
|
|
struct rsnd_mod *mod,
|
|
int is_play, int is_from)
|
|
{
|
|
struct rsnd_priv *priv = rsnd_io_to_priv(io);
|
|
|
|
if (!mod)
|
|
return 0;
|
|
|
|
/*
|
|
* gen1 uses default DMA addr
|
|
*/
|
|
if (rsnd_is_gen1(priv))
|
|
return 0;
|
|
else if (rsnd_is_gen4(priv))
|
|
return rsnd_gen4_dma_addr(io, mod, is_play, is_from);
|
|
else
|
|
return rsnd_gen2_dma_addr(io, mod, is_play, is_from);
|
|
}
|
|
|
|
#define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */
|
|
static void rsnd_dma_of_path(struct rsnd_mod *this,
|
|
struct rsnd_dai_stream *io,
|
|
int is_play,
|
|
struct rsnd_mod **mod_from,
|
|
struct rsnd_mod **mod_to)
|
|
{
|
|
struct rsnd_mod *ssi;
|
|
struct rsnd_mod *src = rsnd_io_to_mod_src(io);
|
|
struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io);
|
|
struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
|
|
struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
|
|
struct rsnd_mod *mod[MOD_MAX];
|
|
struct rsnd_mod *mod_start, *mod_end;
|
|
struct rsnd_priv *priv = rsnd_mod_to_priv(this);
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
int nr, i, idx;
|
|
|
|
/*
|
|
* It should use "rcar_sound,ssiu" on DT.
|
|
* But, we need to keep compatibility for old version.
|
|
*
|
|
* If it has "rcar_sound.ssiu", it will be used.
|
|
* If not, "rcar_sound.ssi" will be used.
|
|
* see
|
|
* rsnd_ssiu_dma_req()
|
|
* rsnd_ssi_dma_req()
|
|
*/
|
|
if (rsnd_ssiu_of_node(priv)) {
|
|
struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
|
|
|
|
/* use SSIU */
|
|
ssi = ssiu;
|
|
if (this == rsnd_io_to_mod_ssi(io))
|
|
this = ssiu;
|
|
} else {
|
|
/* keep compatible, use SSI */
|
|
ssi = rsnd_io_to_mod_ssi(io);
|
|
}
|
|
|
|
if (!ssi)
|
|
return;
|
|
|
|
nr = 0;
|
|
for (i = 0; i < MOD_MAX; i++) {
|
|
mod[i] = NULL;
|
|
nr += !!rsnd_io_to_mod(io, i);
|
|
}
|
|
|
|
/*
|
|
* [S] -*-> [E]
|
|
* [S] -*-> SRC -o-> [E]
|
|
* [S] -*-> SRC -> DVC -o-> [E]
|
|
* [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E]
|
|
*
|
|
* playback [S] = mem
|
|
* [E] = SSI
|
|
*
|
|
* capture [S] = SSI
|
|
* [E] = mem
|
|
*
|
|
* -*-> Audio DMAC
|
|
* -o-> Audio DMAC peri peri
|
|
*/
|
|
mod_start = (is_play) ? NULL : ssi;
|
|
mod_end = (is_play) ? ssi : NULL;
|
|
|
|
idx = 0;
|
|
mod[idx++] = mod_start;
|
|
for (i = 1; i < nr; i++) {
|
|
if (src) {
|
|
mod[idx++] = src;
|
|
src = NULL;
|
|
} else if (ctu) {
|
|
mod[idx++] = ctu;
|
|
ctu = NULL;
|
|
} else if (mix) {
|
|
mod[idx++] = mix;
|
|
mix = NULL;
|
|
} else if (dvc) {
|
|
mod[idx++] = dvc;
|
|
dvc = NULL;
|
|
}
|
|
}
|
|
mod[idx] = mod_end;
|
|
|
|
/*
|
|
* | SSI | SRC |
|
|
* -------------+-----+-----+
|
|
* is_play | o | * |
|
|
* !is_play | * | o |
|
|
*/
|
|
if ((this == ssi) == (is_play)) {
|
|
*mod_from = mod[idx - 1];
|
|
*mod_to = mod[idx];
|
|
} else {
|
|
*mod_from = mod[0];
|
|
*mod_to = mod[1];
|
|
}
|
|
|
|
dev_dbg(dev, "module connection (this is %s)\n", rsnd_mod_name(this));
|
|
for (i = 0; i <= idx; i++) {
|
|
dev_dbg(dev, " %s%s\n",
|
|
rsnd_mod_name(mod[i] ? mod[i] : &mem),
|
|
(mod[i] == *mod_from) ? " from" :
|
|
(mod[i] == *mod_to) ? " to" : "");
|
|
}
|
|
}
|
|
|
|
static int rsnd_dma_alloc(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
|
|
struct rsnd_mod **dma_mod)
|
|
{
|
|
struct rsnd_mod *mod_from = NULL;
|
|
struct rsnd_mod *mod_to = NULL;
|
|
struct rsnd_priv *priv = rsnd_io_to_priv(io);
|
|
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
struct rsnd_dma *dma;
|
|
struct rsnd_mod_ops *ops;
|
|
enum rsnd_mod_type type;
|
|
int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma,
|
|
struct rsnd_mod *mod_from, struct rsnd_mod *mod_to);
|
|
int is_play = rsnd_io_is_play(io);
|
|
int ret, dma_id;
|
|
|
|
/*
|
|
* DMA failed. try to PIO mode
|
|
* see
|
|
* rsnd_ssi_fallback()
|
|
* rsnd_rdai_continuance_probe()
|
|
*/
|
|
if (!dmac)
|
|
return -EAGAIN;
|
|
|
|
rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to);
|
|
|
|
/* for Gen2 or later */
|
|
if (mod_from && mod_to) {
|
|
ops = &rsnd_dmapp_ops;
|
|
attach = rsnd_dmapp_attach;
|
|
dma_id = dmac->dmapp_num;
|
|
type = RSND_MOD_AUDMAPP;
|
|
} else {
|
|
ops = &rsnd_dmaen_ops;
|
|
attach = rsnd_dmaen_attach;
|
|
dma_id = dmac->dmaen_num;
|
|
type = RSND_MOD_AUDMA;
|
|
}
|
|
|
|
/* for Gen1, overwrite */
|
|
if (rsnd_is_gen1(priv)) {
|
|
ops = &rsnd_dmaen_ops;
|
|
attach = rsnd_dmaen_attach;
|
|
dma_id = dmac->dmaen_num;
|
|
type = RSND_MOD_AUDMA;
|
|
}
|
|
|
|
dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
|
|
if (!dma)
|
|
return -ENOMEM;
|
|
|
|
*dma_mod = rsnd_mod_get(dma);
|
|
|
|
ret = rsnd_mod_init(priv, *dma_mod, ops, NULL,
|
|
type, dma_id);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_dbg(dev, "%s %s -> %s\n",
|
|
rsnd_mod_name(*dma_mod),
|
|
rsnd_mod_name(mod_from ? mod_from : &mem),
|
|
rsnd_mod_name(mod_to ? mod_to : &mem));
|
|
|
|
ret = attach(io, dma, mod_from, mod_to);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);
|
|
dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0);
|
|
dma->mod_from = mod_from;
|
|
dma->mod_to = mod_to;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
|
|
struct rsnd_mod **dma_mod)
|
|
{
|
|
if (!(*dma_mod)) {
|
|
int ret = rsnd_dma_alloc(io, mod, dma_mod);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type);
|
|
}
|
|
|
|
int rsnd_dma_probe(struct rsnd_priv *priv)
|
|
{
|
|
struct platform_device *pdev = rsnd_priv_to_pdev(priv);
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
struct rsnd_dma_ctrl *dmac;
|
|
struct resource *res;
|
|
|
|
/*
|
|
* for Gen1
|
|
*/
|
|
if (rsnd_is_gen1(priv))
|
|
return 0;
|
|
|
|
/*
|
|
* for Gen2 or later
|
|
*/
|
|
dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL);
|
|
if (!dmac) {
|
|
dev_err(dev, "dma allocate failed\n");
|
|
return 0; /* it will be PIO mode */
|
|
}
|
|
|
|
/* for Gen4 doesn't have DMA-pp */
|
|
if (rsnd_is_gen4(priv))
|
|
goto audmapp_end;
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp");
|
|
if (!res) {
|
|
dev_err(dev, "lack of audmapp in DT\n");
|
|
return 0; /* it will be PIO mode */
|
|
}
|
|
|
|
dmac->dmapp_num = 0;
|
|
dmac->ppres = res->start;
|
|
dmac->ppbase = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(dmac->ppbase))
|
|
return PTR_ERR(dmac->ppbase);
|
|
audmapp_end:
|
|
priv->dma = dmac;
|
|
|
|
/* dummy mem mod for debug */
|
|
return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, 0, 0);
|
|
}
|